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Thank you for your help. Got it.

It doesn't print anything, it never gets to it. The file gets written, but I just can't read it without changing permissions later.

I'm having issues with dup2(). I can write to a file, however it's classified as no read, no write. I want it to be read-only.

I think I have what I need in this excerpt.
graph[i] is an array...